Hair treatment applicator



FIG. 1 is a front view to our new design showing a hair treatment applicator and wherein the rear view is a mirror image;

FIG. 2 is a top plan view thereof and wherein the bottom plan view is a mirror image;

FIG. 3 is a left elevation view thereof; and,

FIG. 4 is a right side elevation view thereof. 

The ornamental design for a hair treatment applicator, as shown and described. 